Wire and cable manufacturers mark power circuits according to the tone of power lines

Gray black - Internal wiring of equipment and machine equipment.

Dark brown - positive level of direct current circuit.

Bright red - the C phase of a three-phase circuit;

Collector junction of semiconductor material triode;

The negative electrode of a semiconductor material diode, rectifier diode or thyristor tube.

Light yellow - phase A of a three-phase circuit;

Semiconductor material triode base;

Control pole of thyristor tube and bidirectional thyristor tube.

Emerald green - phase B of a three-phase circuit.

Dark blue - negative level of direct current circuit;

Emitter of semiconductor material triode;

Anodizing of semiconductor material diodes, rectifier diodes or thyristor tubes.

Light blue - the neutral line or neutral point of a three-phase circuit; Dc circuit grounding device center line.

Milky white

Main electrical level of bidirectional thyristor tube; Semiconductor material power supply circuit without specific color collocation.

Yellow and green two colors (each color width about 15 ~ 100mm replacement attachment) - safety of the wire connector.

Red, gray and black parallel processing - AC circuits connected by two core power lines or two strands.

2, wire and cable manufacturers choose the tone of the power line according to the power circuit

Communication AC three-phase circuit

Phase A: light yellow; Phase B: emerald green; Phase C: bright red;

Neutral line or neutral point: light blue; Wire connectors for safety: yellow and green.

An alternating current circuit connected by a two-core transmission line or two strands

Red, gray and black parallel processing.

Direct current circuit

Positive: dark brown; Negative: dark blue; Grounding device center line: light blue.

Semiconductor material power supply circuit

Collector junction of semiconductor material triode: bright red; Base: light yellow; Emitter: dark blue. Anodizing of semiconductor diodes and rectifier diodes: dark blue; Negative electrode: Bright red.

Anode oxidation of thyristor tube: dark blue; Control pole: light yellow; Negative electrode: Bright red.

Control pole of bidirectional thyristor tube: light yellow; Main electrical grade: milky white.

The internal wiring of all equipment and machine equipment is generally highly recommended: gray and black; Semiconductor material power supply circuit: milky white;

When there is confusion: Allow to select other tones outside the specific color matching (such as: orange, purple, gray, green blue, rose red, etc.).

Wire and cable manufacturers actual color

On a transmission line, if two or more colors can be labeled, depending on the special condition of the power supply circuit, according to a certain type of meaning that must be indicated in the power supply circuit.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098